CN109596080B - Shock absorber cylinder inner hole precision detector - Google Patents
Shock absorber cylinder inner hole precision detector Download PDFInfo
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- CN109596080B CN109596080B CN201910029555.1A CN201910029555A CN109596080B CN 109596080 B CN109596080 B CN 109596080B CN 201910029555 A CN201910029555 A CN 201910029555A CN 109596080 B CN109596080 B CN 109596080B
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- measuring head
- shock absorber
- absorber cylinder
- elastic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/10—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring diameters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/20—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring contours or curvatures, e.g. determining profile
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- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention provides a precision detector for an inner hole of a shock absorber cylinder barrel, and belongs to the technical field of measuring instruments. The base is included, a clamping device for pressing from both sides tight bumper shock absorber cylinder, rotary driving mechanism, a straight line actuating mechanism for driving rotary driving mechanism rectilinear movement, measure the main shaft, the elasticity measuring head and be used for acquireing the displacement distance of elasticity measuring head measurement in-process along perpendicular to bumper shock absorber cylinder axis direction, it is rotatory that the measurement main shaft is used for under rotary driving mechanism's drive, the elasticity measuring head slides and sets up and is measuring the main shaft below, the elasticity measuring head includes relative stiff end and elasticity end, during the measurement state, the stiff end and the elasticity end of elasticity measuring head all push up and lean on the interior pore wall of bumper shock absorber cylinder. The precision detector for the inner hole of the shock absorber cylinder barrel provided by the invention realizes automatic detection of the size, the roundness and the cylindricity of the inner hole of the shock absorber cylinder barrel, has high detection precision and high detection efficiency, reduces the labor intensity of operators and improves the production efficiency.
Description
Technical Field
The invention belongs to the technical field of measuring instruments, and particularly relates to a precision detector for an inner hole of a cylinder barrel of a shock absorber.
Background
The cylinder barrel of the shock absorber of the armed combat tank is formed by welding a cold-drawn steel pipe and a bottom end cover, and the diameter of a cylinder barrel hole of the shock absorber is small, generally about 50mm, and the length of the cylinder barrel hole is large, generally about 300 mm. When the size error and the shape error of the inner hole of the shock absorber cylinder barrel are detected at present, a general measuring tool is generally adopted to go deep into the inner hole of the shock absorber cylinder barrel for detection, and an operator reads the inner hole, so that the detection error is large, and the detection efficiency is low.
Disclosure of Invention
The invention provides a precision detector for an inner hole of a shock absorber cylinder barrel, and aims to solve the technical problems of poor detection precision and low detection efficiency of the detection of the inner hole of the shock absorber cylinder barrel in the prior art.
In order to achieve the above object, the present invention provides a precision detector for an inner hole of a cylinder of a shock absorber, including:
the base is provided with an upright post;
the clamping mechanism is arranged on the base and used for clamping a first end of the shock absorber cylinder barrel, and the axis direction of the shock absorber cylinder barrel is in the X direction in the clamping state;
the measuring main shaft is used for rotating around a rotating shaft parallel to the X direction under the driving of the rotating driving mechanism;
the elastic measuring head is arranged below the measuring main shaft in a sliding mode along a guide rail perpendicular to the X direction and comprises a fixed end and an elastic end which are opposite, and the fixed end and the elastic end of the elastic measuring head are both abutted against the inner hole wall of the shock absorber cylinder barrel in the measuring state;
the linear driving mechanism is arranged on the upright column and used for driving the rotary driving mechanism to linearly move in parallel to the X direction so that the elastic measuring head penetrates into an inner hole of the shock absorber cylinder from the second end of the shock absorber cylinder; and
and the displacement sensor is arranged at the first end of the guide rail and used for acquiring the moving distance of the elastic measuring head along the direction of the guide rail in the measuring process.
Further, the elastic measuring head is arranged on the guide rail through a measuring rod parallel to the X direction in a sliding manner, and the elastic measuring head comprises:
the first measuring head is fixedly arranged on the side wall of the measuring rod;
the second measuring head is arranged on the measuring rod through a spring and is located on two sides of the axis of the measuring rod, and the axis of the first measuring head is parallel to the axis of the second measuring head and is parallel to the guide rail.
Further, the measuring stick lower extreme is equipped with and is used for the installation the shoulder hole of second measuring head, the second measuring head includes:
a segment;
the first end of the cylindrical shaft extends into the small end of the stepped hole, and the second end of the cylindrical shaft is connected with the ball segment;
the first end of the spring is connected with the bottom of the large end of the stepped hole, and the second end of the spring is connected with a check ring fixedly arranged on the cylindrical shaft.
Further, the elastic measurement head further comprises:
and the two semicircular pressing plates are fixedly arranged on the side wall of the measuring rod and sleeved outside the cylindrical shaft in clearance fit with the cylindrical shaft for guiding.
Further, first measuring head is spherical measuring head, when the spring is in natural state, the outermost point of first measuring head with the distance of ball scarce outermost point is greater than 2~3mm of bumper shock absorber cylinder hole diameter.
Further, the axis of the first measuring head is collinear with the axis of the second measuring head.
Further, the measuring portion of the displacement sensor abuts against the side wall of the measuring rod in a direction parallel to the guide rail.
Furthermore, the main measuring shaft is a stepped shaft, the small-diameter section of the main measuring shaft is connected with the rotary driving mechanism, and the large-diameter section of the main measuring shaft is used for installing the guide rail.
Further, bumper shock absorber cylinder hole precision detector still includes:
and the control unit is used for receiving the displacement signal of the displacement sensor and acquiring the radius value and the roundness error of each point on the inner hole of the cylinder barrel of the shock absorber according to the displacement signal.
Further, the clamping mechanism is a self-centering three-jaw chuck, and the axis of the self-centering three-jaw chuck is collinear with the axis of the measuring spindle.
The shock absorber cylinder inner hole precision detector provided by the invention has the beneficial effects that the fixing and positioning of the shock absorber cylinder are carried out through the clamping mechanism, the rotation of the measuring main shaft around the direction parallel to the axis of the shock absorber cylinder can be realized through the linear driving mechanism and the rotary driving mechanism, meanwhile, the linear movement is carried out along the axis direction of the shock absorber cylinder, the elastic measuring head is arranged below the measuring main shaft in a sliding manner along the guide rail, and the guide rail is vertical to the axis direction of the shock absorber cylinder, so that the elastic measuring head can rotate and linearly feed under the driving of the linear driving mechanism and the rotary driving mechanism, and the detection of the size and the roundness of the inner hole of the shock absorber cylinder can; before detection, the elastic measuring head is calibrated to obtain the distance d between the fixed end of the elastic measuring head and the axis of the cylinder barrel of the shock absorber, the elastic measuring head is deep into the inner hole of the shock absorber cylinder, the fixed end and the elastic end of the elastic measuring head are both propped against the inner hole wall of the shock absorber cylinder, in the rotating process, the elastic measuring head is extruded by the inner hole wall of the damper cylinder and slides along a guide rail vertical to the axis direction of the damper cylinder, the displacement sensor is arranged at the first end of the guide rail to obtain the moving distance of the elastic measuring head along the guide rail direction in the measuring process, when the elastic measuring head rotates for one circle along the same circumference, the difference value between the maximum value and the minimum value of the displacement sensor is the roundness of the measuring circumference, the position of the measuring point of the elastic measuring head is adjusted by the linear driving mechanism, the cylindricity of the inner hole of the shock absorber cylinder can be obtained, and the algebraic sum of the measured value of the displacement sensor and the d is the radius value of each point on the same circumference of the inner hole of the shock absorber cylinder. In practical application, the elastic measuring head can be automatically controlled through the linear driving mechanism and the rotary driving mechanism, the detection efficiency is high, an operator does not need to read a detection result, the detection precision is high, the detection result can be automatically calculated and displayed through the control unit, and real-time display and storage of detection data are realized. The precision detector for the inner hole of the shock absorber cylinder barrel provided by the invention realizes automatic detection of the size, the roundness and the cylindricity of the inner hole of the shock absorber cylinder barrel, has high detection precision and high detection efficiency, reduces the labor intensity of operators and improves the production efficiency.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an inner hole precision detector of a shock absorber cylinder provided by an embodiment of the invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a partially enlarged view at B in fig. 1.
Wherein, each reference numeral:
1. a base; 11. a column; 12. a column guide rail; 13. a guide rail slider; 14. mounting a plate; 2. a clamping mechanism; 3. measuring the main shaft; 31. a guide rail; 32. a slider; 4. an elastic measuring head; 41. a first measuring head; 42. a second measuring head; 421. a segment; 422. a cylindrical shaft; 423. a retainer ring; 424. a semicircular pressing plate; 43. a spring; 5. a linear drive mechanism; 51. a first servo motor; 52. a ball screw; 53. a lead screw nut; 54. a sliding table; 6. a rotation driving mechanism; 61. a second servo motor; 62. a ball bearing; 7. a damper cylinder; 8. a displacement sensor; 81. a measuring section; 9. a measuring rod; 91. a stepped hole; 10. a display.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "plurality" or "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to fig. 3, the precision detector for the inner bore of the cylinder of the shock absorber provided by the present invention will now be described. The shock absorber cylinder inner hole precision detector comprises a base 1, a clamping mechanism 2, a measuring main shaft 3, an elastic measuring head 4, a linear driving mechanism 5, a rotary driving mechanism 6 and a displacement sensor 8, wherein the clamping mechanism 2 is arranged on the base 1 and used for clamping a first end of a shock absorber cylinder 7, and in a clamping state, the axis direction of the shock absorber cylinder 7 is in the X direction; the measuring spindle 3 is driven by a rotary driving mechanism 6 to rotate around a rotating shaft parallel to the X direction; the elastic measuring head 4 is arranged below the measuring main shaft 3 in a sliding manner along a guide rail 31 perpendicular to the X direction, the elastic measuring head 4 comprises a fixed end and an elastic end which are opposite, and the fixed end and the elastic end of the elastic measuring head 4 are both propped against the inner hole wall of the shock absorber cylinder 7 in the measuring state; the linear driving mechanism 5 is arranged on the upright post 11 of the base 1 and is used for driving the rotary driving mechanism 6 to linearly move in parallel to the X direction, so that the elastic measuring head 4 extends into an inner hole of the shock absorber cylinder 7 from the second end of the shock absorber cylinder; the displacement sensor 8 is arranged at a first end of the guide rail 31 and is used for acquiring the moving distance of the elastic measuring head 4 along the direction of the guide rail 31 during the measurement process.
Roundness is the difference in radius between two concentric circles that encompass the actual contour of the same cross-section and have the smallest difference in radius. The tolerance zone is the area between two concentric circles whose difference in radius is the value of the tolerance.
The cylindricity refers to the difference between the maximum dimension and the minimum dimension of any vertical section, the cylindricity error comprises errors in two aspects of an axial section and a transverse section, a tolerance zone of the cylindricity is an area between two coaxial cylindrical surfaces, and the radial distance between the two coaxial cylindrical surfaces is a tolerance value.
In practical application, a measured part is generally placed on a V-shaped block, the axis of the measured part is perpendicular to a measured section, the axial position is fixed, the maximum difference value of the indicating and indicating values is used as the roundness error of a single section in the process that the measured part rotates for one circle, a plurality of sections are measured according to the method, and the maximum error value is used as the roundness error of the measured part. In this embodiment, the rotation of the elastic measuring head 4 and the movement of the elastic measuring head parallel to the radial direction of the damper cylinder 7 simulate the rotary motion of the measured part on the V-shaped block, the moving value is read in real time through the displacement sensor 8, the storing and calculating of the moving value can be performed through the control unit, the difference between the maximum value and the minimum value of the displacement sensor 8 is obtained in the process of rotating the elastic measuring head 4 for one circle, the elastic measuring head 4 is driven to move along the axis direction of the damper cylinder 7 through the linear driving mechanism 5, the adjustment of the measuring position is realized, the accuracy of the value of the roundness is guaranteed, and the cylindricity is obtained simultaneously.
Optionally, the linear driving mechanism 5 is a ball screw 52 and a screw nut 53 driven by the first servo motor 3, the sliding table 54 is fixedly connected to the screw nut 53 for mounting the rotary driving mechanism 6, wherein the first servo motor 3 is disposed on the column 11 through the mounting plate 14, the sliding table 54 is slidably mounted on the column guide rail 12 through the rail slider 13, and the stability of the linear motion of the sliding table 54 and the rotary driving mechanism 6 mounted thereon is ensured, wherein the column guide rail 12 is parallel to the X direction. The rotation drive mechanism 6 includes a second servo motor 61 and a ball bearing 62 for driving the measurement spindle 3 to rotate.
In the precision detector for the inner hole of the shock absorber cylinder, the precision detector for the inner hole of the shock absorber cylinder has the advantages that the shock absorber cylinder is fixed and positioned through the clamping mechanism, the measuring main shaft can rotate around the direction parallel to the axis of the shock absorber cylinder through the linear driving mechanism and the rotary driving mechanism and can move linearly along the axis of the shock absorber cylinder, the elastic measuring head is arranged below the measuring main shaft in a sliding mode along the guide rail, the guide rail is perpendicular to the axis of the shock absorber cylinder, the elastic measuring head can rotate and feed linearly under the driving of the linear driving mechanism and the rotary driving mechanism, and the size and the roundness of the inner hole of the shock absorber cylinder can be detected; before detection, the elastic measuring head is calibrated to obtain the distance d between the fixed end of the elastic measuring head and the axis of the cylinder barrel of the shock absorber, the elastic measuring head is deep into the inner hole of the shock absorber cylinder, the fixed end and the elastic end of the elastic measuring head are both propped against the inner hole wall of the shock absorber cylinder, in the rotating process, the elastic measuring head is extruded by the inner hole wall of the damper cylinder and slides along a guide rail vertical to the axis direction of the damper cylinder, the displacement sensor is arranged at the first end of the guide rail to obtain the moving distance of the elastic measuring head along the guide rail direction in the measuring process, when the elastic measuring head rotates for one circle along the same circumference, the difference value between the maximum value and the minimum value of the displacement sensor is the roundness of the measuring circumference, the position of the measuring point of the elastic measuring head is adjusted by the linear driving mechanism, the cylindricity of the inner hole of the shock absorber cylinder can be obtained, and the algebraic sum of the measured value of the displacement sensor and the d is the radius value of each point on the same circumference of the inner hole of the shock absorber cylinder. In practical application, the elastic measuring head can be automatically controlled through the linear driving mechanism and the rotary driving mechanism, the detection efficiency is high, an operator does not need to read a detection result, the detection precision is high, the detection result can be automatically calculated and displayed through the control unit, and real-time display and storage of detection data are realized. The precision detector for the inner hole of the shock absorber cylinder barrel provided by the invention realizes automatic detection of the size, the roundness and the cylindricity of the inner hole of the shock absorber cylinder barrel, has high detection precision and high detection efficiency, reduces the labor intensity of operators and improves the production efficiency.
Referring to fig. 1 and 2, an elastic measuring head 4 is slidably disposed on a guide rail 31 through a measuring rod 9 parallel to an X direction, the elastic measuring head 4 includes a first measuring head 41 and a second measuring head 42, and the first measuring head 41 is fixedly disposed on a side wall of the measuring rod 9; the second measuring head 42 is arranged on the measuring rod 9 through a spring 43 and is located on two sides of the axis of the measuring rod 9 together with the first measuring head 41, and the axes of the first measuring head 41 and the second measuring head 42 are parallel to each other and are parallel to the guide rail 31.
During the measurement state, elastic measuring head 4 goes deep into the bumper shock absorber cylinder hole, first measuring head 41 and second measuring head 42 are relative and all lean on the bumper shock absorber cylinder hole wall, the extrusion force size that first measuring head 41 and second measuring head 42 bore is the same, the opposite direction, and all be on a parallel with guide rail 31, wherein first measuring head 41 is the stiff end, so the distance of first measuring head 41 distance measuring rod 9's axis is unchangeable, second measuring head 42 is the elastic end, bear the change of the compression stroke that the extrusion force leads to spring 43, because the radial dimension of bumper shock absorber cylinder hole with the circumference is different, so spring 43 receives the extrusion force size real-time change, make measuring rod 9 slide along guide rail 31, obtain the size of the displacement of measuring rod 9 through displacement sensor 8. It will be appreciated that the displacement sensor 8 is self-supporting with a return spring, so that the measuring part 81 of the displacement sensor 8 always bears against the measuring rod 9.
As a specific embodiment of the shock absorber cylinder bore accuracy detector provided by the present invention, please refer to fig. 1 and fig. 2, a stepped hole 91 for installing the second measuring head 42 is provided at the lower end of the measuring rod 9, the second measuring head 42 includes a segment 421 and a cylindrical shaft 422, a first end of the cylindrical shaft 422 extends into a small end of the stepped hole 91, and a second end is connected to the segment 421; the first end of the spring 43 is connected to the bottom of the large end of the stepped hole 91, and the second end is connected to a retainer ring 423 fixed to the cylindrical shaft 422.
The stepped hole 91 is arranged at one end, close to the shock absorber cylinder 7, of the measuring rod 9, the axis of the stepped hole 91 is parallel to the guide rail 31, the large end of the stepped hole 91 is located outside the side wall of the measuring rod 9, and the small end of the stepped hole 91 is located inside the measuring rod 9, so that the two ends of the spring 43 can be connected with the bottom of the large end and the check ring 423 respectively. In practical application, when the radius size of the inner hole of the shock absorber cylinder barrel is reduced, the segment 421 bears extrusion force to drive the cylindrical shaft 422 to go deep into the small end of the stepped hole 91, and simultaneously compress the spring 43, at the moment, the measuring rod 9 is driven by the spring 43 to be close to the displacement sensor 8, when the radius size of the inner hole of the shock absorber cylinder barrel is increased, the compression amount of the spring 43 is reduced, at the moment, the measuring rod 9 is far away from the displacement sensor 8, and the measuring rod 9 rotates for a circle, so that the radius size change value of the inner hole of the shock absorber cylinder barrel and the radius size change value of the; the linear driving mechanism 5 drives the measuring rod 9 to move along the axial direction of the damper cylinder 7, namely X-direction movement, and the radius size change value of each circumference of the inner hole of the damper cylinder can be obtained. It should be understood that the radius, roundness and cylindricity of the inner bore of the shock absorber cylinder are calculated from the above two dimensions.
Referring to fig. 1 and 2, the elastic measuring head 42 further includes two semicircular pressing plates 424 fixed on the side wall of the measuring rod 9, and sleeved on the outside of the cylindrical shaft 422 and in clearance fit with the cylindrical shaft 422 for guiding. The two semicircular pressing plates 424 are arranged for guiding, so that the cylindrical shaft 422 can only move along the axial direction of the stepped hole 91, and the measuring precision is improved.
Referring to fig. 1 and 2, as a specific embodiment of the shock absorber cylinder bore hole precision detector provided by the present invention, when the first measuring head 41 is a spherical measuring head, and the spring 43 is in a natural state, a distance between an outermost point of the first measuring head 41 and an outermost point of the ball notch 421 is greater than a diameter of the shock absorber cylinder bore hole by 2-3 mm. Through the setting of spherical measuring head and size between the two, sharp drive assembly 5 can the direct drive elastic measuring head 4 go deep into the inside of bumper shock absorber cylinder hole from the second end of bumper shock absorber cylinder 7, does not need operating personnel to intervene, and ensures that spring 43 is in compression state for first measuring head 41 and segment 421 are leaned on bumper shock absorber cylinder hole wall all the time.
Referring to fig. 1 and 2, as an embodiment of the present invention, an axis of the first measuring head 41 is collinear with an axis of the second measuring head 42. When the measuring rod 9 rotates, the first measuring head 41 and the second measuring head 42 bear the same pressing force, and the pressing force are opposite and coaxial, so that the measuring rod 9 does not bear bending moment.
As a specific embodiment of the present invention, please refer to fig. 1, a measuring portion 81 of the displacement sensor 8 abuts against a side wall of the measuring rod 9 along a direction parallel to the guide rail 31. The displacement sensor 8 is provided with a return spring, the measuring part 81 of the displacement sensor can always abut against the side wall of the measuring rod 9 through the position setting of the displacement sensor 8, and the measuring part 81 is arranged in parallel with the guide rail 31, so that the moving distance of the measuring rod 9, namely the elastic measuring head 4, along the guide rail 31 can be directly obtained in real time.
Referring to fig. 1 and 3, as a specific embodiment of the shock absorber cylinder bore accuracy detector provided by the present invention, a measuring spindle 3 is a stepped spindle, a small diameter section of the measuring spindle 3 is connected to a rotation driving mechanism 6, and a large diameter section of the measuring spindle 3 is used for installing a guide rail 31.
The small-diameter section of the measuring main shaft 3 is connected with the second servo motor 61 through a coupler, the side wall of the small-diameter section of the measuring main shaft 3 is arranged on the connecting plate through a ball bearing 62, the large-diameter section of the measuring main shaft 3 is located below the small-diameter section, the center position of the lower end face of the large-diameter section of the measuring main shaft 3 is fixedly connected with the guide rail 31, and the two end faces in the length direction of the guide rail 31 are symmetrical relative to the axis of the measuring main shaft 3.
As a specific embodiment of the shock absorber cylinder inner hole precision detector provided by the present invention, please refer to fig. 1 and 3, the shock absorber cylinder inner hole precision detector further includes a control unit for receiving a displacement signal of the displacement sensor 8 and obtaining a radius value and a roundness error of each point of the shock absorber cylinder inner hole according to the displacement signal.
The control unit can be an industrial computer, a programmable logic controller or a singlechip, and can meet the requirements by adopting a general numerical control system for control. Optionally, the control unit through-hole relay is electrically connected with the first servo motor 51 and the second servo motor 61, and automatically controls the start, stop and rotation direction of the first servo motor 51 and the second servo motor 61 according to the control logic, so as to realize automatic control of the precision detection of the inner hole of the damper cylinder.
As a specific embodiment of the shock absorber cylinder bore accuracy detector provided by the invention, please refer to fig. 1, the clamping mechanism 2 is a self-centering three-jaw chuck, and the axis of the self-centering three-jaw chuck is collinear with the axis of the measuring spindle 3. The damper cylinder 7 is clamped through the self-centering three-jaw chuck, and the axis of the self-centering three-jaw chuck is collinear with the axis of the damper cylinder 7. Before detection, the elastic measuring head 4 is calibrated to obtain the distance d between the first measuring head 41 and the axis of the measuring rod 9, and through the collinear design of the damper cylinder 7 and the measuring main shaft 3, the algebraic sum of the measured value of the displacement sensor 8 and the distance d is the radius value of each point of the same circumference of the inner hole of the damper cylinder, and the calculation is simple.
In this embodiment, the present detector is calibrated to obtain the distance from the outermost point of the first measuring head 41 to the axis of the measuring rod 9. The base 1 is placed on the table top of a workbench, and the damper cylinder 7 is clamped on a self-centering three-jaw chuck, wherein the damper cylinder 7 is in a vertical state, and the X direction is a vertical direction; the first servo motor 51 is started in the forward direction, the sliding table and the component connected with the sliding table are driven by the ball screw and the screw nut to move downwards slowly together until the elastic measuring head 4 reaches a first detection position; start second servo motor 61, the drive measures main shaft 3, guide rail 31, displacement sensor 8, measuring stick 9 and elastic measuring head 4 slowly rotate a week, in this process, because spring 43's impetus effect, first measuring head 41 and second measuring head 42 sphere are laminated with bumper shock absorber cylinder inner bore wall respectively all the time, measuring stick 9 drives first measuring head 41 and second measuring head 42 on the one hand and rotates along the axis of measuring main shaft 3, along guide rail 31 reciprocating motion on one side, displacement sensor 8 self has reset spring, so its measuring part 81 supports all the time on the lateral wall of measuring stick 9. The algebraic sum of the distance from the outermost point of the first measuring head 41 to the axis of the measuring rod 9 and the measured value of the displacement sensor 8 is the radius value of each point of the same circumference of the inner hole of the cylinder barrel of the shock absorber, the second measuring head 42 rotates for a circle, the difference value between the maximum value and the minimum value of the displacement sensor 8 is the roundness of the circumference surface, the control unit acquires the position signal of the displacement sensor 8, completes the storage and calculation of the measured data and displays the result on the display 10; continuing to rotate the first servo motor 51 to reach the second detection position, and repeating the above process until the measurement of the second detection position is completed; after the detection of all the measuring points is finished, the maximum roundness error of the plurality of detection positions is the roundness error of the damper cylinder, and the control unit can calculate and obtain the cylindricity of the damper cylinder according to the minimum condition.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. Shock absorber cylinder hole precision detector, its characterized in that includes:
the base is provided with an upright post;
the clamping mechanism is arranged on the base and used for clamping a first end of the shock absorber cylinder barrel, and the axis direction of the shock absorber cylinder barrel is in the X direction in the clamping state;
the measuring main shaft is used for rotating around a rotating shaft parallel to the X direction under the driving of the rotating driving mechanism;
the elastic measuring head is arranged below the measuring main shaft in a sliding mode along a guide rail perpendicular to the X direction and comprises a fixed end and an elastic end which are opposite, and the fixed end and the elastic end of the elastic measuring head are both abutted against the inner hole wall of the shock absorber cylinder barrel in the measuring state; the elastic measuring head slides through the measuring stick that is on a parallel with X to be set up on the guide rail, the elastic measuring head includes:
the first measuring head is fixedly arranged on the side wall of the measuring rod;
the second measuring head is arranged on the measuring rod through a spring and is positioned on two sides of the axis of the measuring rod together with the first measuring head, and the axes of the first measuring head and the second measuring head are parallel to each other and are parallel to the guide rail;
the measuring stick lower extreme is equipped with and is used for the installation the shoulder hole of second measuring head, the second measuring head includes:
a segment;
the first end of the cylindrical shaft extends into the small end of the stepped hole, and the second end of the cylindrical shaft is connected with the ball segment;
the first end of the spring is connected with the bottom of the large end of the stepped hole, and the second end of the spring is connected with a check ring fixedly arranged on the cylindrical shaft;
the linear driving mechanism is arranged on the upright column and used for driving the rotary driving mechanism to linearly move in parallel to the X direction so that the elastic measuring head penetrates into an inner hole of the shock absorber cylinder from the second end of the shock absorber cylinder; and
the displacement sensor is arranged at the first end of the guide rail and used for acquiring the moving distance of the elastic measuring head along the direction of the guide rail in the measuring process, and a measuring part of the displacement sensor is abutted against the side wall of the measuring rod along the direction parallel to the guide rail;
and the control unit is used for receiving the displacement signal of the displacement sensor and acquiring the radius value and the roundness error of each point on the inner hole of the cylinder barrel of the shock absorber according to the displacement signal.
2. The shock absorber cylinder bore hole accuracy detector of claim 1, wherein the elastic measuring head further comprises:
and the two semicircular pressing plates are fixedly arranged on the side wall of the measuring rod and sleeved outside the cylindrical shaft in clearance fit with the cylindrical shaft for guiding.
3. The instrument of claim 2, wherein the first measuring head is a spherical measuring head, and when the spring is in a natural state, a distance between an outermost point of the first measuring head and an outermost point of the ball gap is 2-3 mm larger than a diameter of the inner hole of the shock absorber cylinder.
4. The shock absorber cylinder bore hole accuracy detector of claim 1, wherein the axis of the first measuring head is collinear with the axis of the second measuring head.
5. The instrument of claim 1, wherein the measuring spindle is a stepped spindle, the small diameter section of the measuring spindle is connected to the rotary drive mechanism, and the large diameter section of the measuring spindle is used to mount the guide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910029555.1A CN109596080B (en) | 2019-01-14 | 2019-01-14 | Shock absorber cylinder inner hole precision detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910029555.1A CN109596080B (en) | 2019-01-14 | 2019-01-14 | Shock absorber cylinder inner hole precision detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109596080A CN109596080A (en) | 2019-04-09 |
| CN109596080B true CN109596080B (en) | 2020-07-28 |
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| CN114646256A (en) * | 2022-05-13 | 2022-06-21 | 张家港保税区亚鑫精密制管有限公司 | Shock absorber cylinder hole precision detection device |
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| JP3442515B2 (en) * | 1994-12-27 | 2003-09-02 | 光精工株式会社 | Tap female screw hole inspection device and inspection device using the same |
| CN102749059B (en) * | 2012-07-20 | 2015-01-28 | 上海交通大学 | Dual-feed type device for measuring roundness and cylindricity |
| CN104551079A (en) * | 2013-10-17 | 2015-04-29 | 青岛仁和兴机床制造有限公司 | Numerical-control vertical drilling machine and workpiece machining method thereof |
| CN103697846A (en) * | 2013-12-20 | 2014-04-02 | 二十二冶集团精密锻造有限公司 | Method for detecting wall thickness evenness of multi-directional die forged piece |
| CN104089561B (en) * | 2014-07-30 | 2016-08-31 | 中国计量科学研究院 | Deep hole internal diameter measures system |
| CN104964818B (en) * | 2015-07-06 | 2017-09-12 | 宁波普锐明汽车零部件有限公司 | The detection of base of automobile shock absorber and sorting equipment |
| CN204757945U (en) * | 2015-07-16 | 2015-11-11 | 北京新联铁科技股份有限公司 | Wheel hole measuring engine |
| CN107063052B (en) * | 2016-12-30 | 2019-07-23 | 广东工业大学 | A kind of space inner hole axis angle detection device |
| CN207556504U (en) * | 2017-10-26 | 2018-06-29 | 佛山市兆长电器有限公司 | A kind of testing agency of stator inner hole |
| CN108007310B (en) * | 2017-12-15 | 2020-05-01 | 深圳市海科瑞科技有限公司 | Automatic measuring equipment for engine cylinder sleeve |
| CN208140062U (en) * | 2018-04-20 | 2018-11-23 | 东莞理工学院 | Neutron position detection machine after a kind of metal axle sleeve casting and forming |
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| CN114646256A (en) * | 2022-05-13 | 2022-06-21 | 张家港保税区亚鑫精密制管有限公司 | Shock absorber cylinder hole precision detection device |
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